wilcox



R. L. WILCOX.

v FEED MECHANISM. APPLICATION FILED MAY 8.1917.

Patented July 15, 19l9.

3 SHEETS-SHEET 1 R. L. "IVILCOX.

FEED MECHANISM.

APPLICATION FILED MAY 8. I912.

Patented July 15, 1919.

3 SHEETS-SHEET 2 awwmto'a R. L. WILCOX.

FEED MECHANISM.

APPLICATION FILED MAY 8. 1917.

1,809,749. Patented Jlfly 15, 1919.

3 SHEETS SHEET 3.

s re ra ventries.

RICHARD LESTER WILCOX, F WATERBURY, CONNECTICUT, ASSIGNOR TO THE WATERBURY.FARREL FOUNDRY ANDMACHIN E COMPANZ, OF WATERBURY, CONNECTICUT, A CORPORATION OF CONNECTICUT.

FEED- MECHANI M.

Original application filed May 28, 1915, Serial No. 31,019. Divided and this application filed may 8, 1917.

Serial No.

T 0 all whom it may concern: y

Be it known that I, RICHARD LESTER VIL- ooX, a citizen of the United States, residing at Waterbury, in the county of New Haven. and'State of Connecticut, have invented certaininew and useful Improvements in Feed Mechanism, of which the following is a. specification, reference being had therein to the accompanying drawings.

The invention herein described, being a division of the application filed May 28, 1915, Serial Number 31,019, patented January 15, 1918, Number 1,253,322, relates particularly to feed mechanism, and more especially to Patented July 15, 1919.

same and materially enhancing the convenience of its operation as distinguished from the type of pawl mechanisms above and ratchet, friction devices being-substi-r referred to, wherein the pawl usually moves about the axis of the pawl disk and must be grasped while in motion. In the latter such feed mechanism as is designed to autoc rfeed, the more difficult it is to -grasp and matically and intermittently feed wire to the dies of a heading machine, although not limited thereto.

It is the object of the invention, among other things, to provide means, whereby the feed mechanism will feedrwire intothe heading dies only at such times as the heading dies are-in a position to receive them; to provide means for assuring a full length feed; and in conjunction therewith, to provide readily accessible mechanism that may be easily controlled, which will stop the feed whendesired and necessary. x To these and other ends, my invention consists in the feed mechanism, having certain details of construction and combinations of 1 parts, taken upon line 33 of Fig. 2; K

' parts taken upon line 5 of Fig.

Fig. 4 is an enlarged sectional view of the parts taken upon line 4--4 of Fig. 3

Fig. 5 is an enlarged sectionalview of the Fig. 6 is a detail view of the link block .adjusting mechanism; and Fig. 7 is a detail view of the latch and trip mechanisms The feed mechanism as shown and described herein is constructed without a pawl operate the continually moving pawl. v

The handle aforesaid, employed for checking the feed mechanism, can only be manipulated at a predeterminedtime or times, of which the open position of the dies rela: tively to thefeed passage is the determining factor, because of an interlocking action of a device which is actuated directly by said dies independently of means and mech-' anism, not shown, which establish operative timed relation between the continuously operating dies and the intermittently operated feed mechanism. Said handle may be manipulated so as to release or stop the feeding operation at predetermined times when permissible, andwhen held in an open position, permits the feed mechanism to be operated at regular intervals in timed relation to said dies. 4 t

The length of the stroke of the feed mechanism is adjustable, means being provided for accomplishin this through a coarse ad; justment and a ne adjustment, either one or both of which maybe dispensed with if desired. 1

In the drawings the numeral 1 designates the body of the machine supported upon i legs 2 and 3 is the fly wheel.

Journaled in the body 1 is a shaft 4, which derives a rocking movement through a shifter arm 5, by means not constituting any portion of the present invention.

All of the parts just described are common and well*known in the "art and require no additional description or illustration herein. p The dies. are designated by the numeral form it-is apparent that the more rapid the j 6 and have a lateral mpvement within the -body -1 through the-reciprocating actionof the plate '7 by neans not herein shown or described, and travel so .that the grooves in the meeting faces thereof pass from the line of the wire feed, designated 8, to the line of the heading operation, designated by the numeral 9. The dies are held against the plate 7 and returned to the line '8 ,by mechanlsm'comprising the plate 10 connected to the ends of the slidably monmted rods 11,

having a trip head 12 thereon, against which is the end of a spring 13 secured at its 015- posite end to the body 1 by a cap 14. A screw '15 threaded through the head 12 and abutting against the-body 1, limits the iii- Ward movement of the parts just described.

Pivotally secured within the stud 16. is

the trip latch 17 having trip arms 18 and 19 thereon, through the latter of which is an adjusting screw 20 that lies withinthe path 'ofmovement of the head 12. This latch is subject to the pressure of a spring 21 that bears against the end of a pin 22 contacting with the arm 18 and actuates the said latch to move the trip arm 18 away from the body 1.

Connected with the body 1 is a roll frame 23, within which are rotatably mounted the shafts 24 and 25, each of which is provided with a feed roll 26 and intermeshing gears 27 and 28. In one face of the gear 28 is a ring 29 and concentric therewith is a clutch plate 30 secured by screws 31, and having a" plurality of notches 32 in the edge thereof, said notches having roll faces 33 and an end face 34. .Wi'thinJeach ofsaid notches is" a 'roll 35'that is moyed in one direction be-.

tween the face 33 and the inner face of the v ring 29 by a pin 36 having a head 37 thereon with 'an angular facewhich contacts with the roll 35. -A spring 38 pressing against the end of the pin 36 provides a yielding pressure against the roll 35. q

'Rotatably mounted upon the roll shaft 25 is a trip head 39 having the oifset arm .40

integral. therewith, within which is mounted the block 41 that is adjustable through a 'screw 42 threaded therein and rotatable within the trip head 39 with a spiral gear 43v thereon which meshes into a' spiral gear 44 fixed upon a shaft 45 rotatable in the trip head, 39 through a knob 46 fixed upon the outer end thereof. The position of the knob 46 isso relatively. close to the center of the shaft 25 that its circular movement is very limited and it may be'readily rotated "during the movement of the trip head 39 to vary the radial position of-the block .41 within the I which is held against accidental disengage arm 40. A link 47 that connects the shifter arm 5 and block 41 is secured to the latter by a pin 49 and to the former by a pin 50,

ment by a catch plate 51- rotatably secured to the link by a screw 52 and which enters an .annulargroove 53 in the pin 50. -'This catch plate and itsmethod of operation constitute no part of my present invention.

The length of stroke of the link 47 is varied by shifting the point of connection thereof with the shifter arm 5, this beingaccomplished by passing the pin 50 through any one of a pluralityof holes 54 in thesaid shifter arm. Thisadjustmentis generally trip head 39) moves the rolls 35 against the faces 33, assisted by the action of \the pins 36 so that the rolls impinge against the inner surface of the ring 29, causing a frictional engagement between all of the parts. The ring 29 will now rotate, and through it, the gear 28," with which it is connected, which the clutch plate 30 (which is fastened to the,

rotation in turn is transmitted'to the gear 27, shafts 25 and 24 to the rolls 26, causing ment to the wire therebetween.

Upon the reverse movement of the shifter arm 5, the trip head 39 is moved in the ophaving faces 33, contacts with the periphery of each of the rolls 35 and moves them spring 38. The efi'ect of this action'is to break the connection therewith so that the trip arm rotates freely without lmparting movement to the feed mechanism.

q Immediately upon the'movement of the described,- the friction hold of the ,rolls 35 between the clutch plate 30 and the ring 29 takes place, and all of the parts move with the motion of the triphead 39.

The mechanism for stopping the feed operation comprisesa disk 48, which is rotatably mounted upon the trip head 39, with one face thereof against the face of the ring 29 (see Fig. 4), and inclosed within an overhanging lip 55 upon the gear 28. within this ring are a plurality of release pins 56, corresponding in number with the ro1ls35, and projecting into the path of movement thereof and lying between the Fixed 1 the same to impart an endwise feed moveposite direction, and the clutch plate 30,

against the heads 37, and the tension of the shifter arm 5 being reversed from that last I I roll face 33 andthe ring 29. The center of these release pins 56 is moredistant from the center of the shaft 25 than thatof the'rolls 35, so thatas they engage the said rolls they have a. tendency to force thesame against the face 33 and away from the inside of the ring 29. v Rotatably mounted upon a stud 57 hired in the trip head 39, is a release arm 58 that is connected withthe disk 48 through the pm stud 63, is a roll arm 64, which is connected l 6 I tion shown by dotted lines in "Fig. 1, the

non-feed. position against the stop pin 69,

the tail piece 67 has moved away from the r front of the trip arm 18, as' before de.,

scribed, to a position where it is opposite the notch 70 in the-outer. end of said trip arm 18, which is then moved by the spring pressed pin 22'to the'position shown by full with the handle 65 by the link 66. The i handle 65 is provided with a tail p1ece. 67, and is rotatably mounted upon a fixed stud 68. In'Figs. 1 and 3 the roll arm 64 is shown in such position that the curved portion or sweep thereof is concentric-with the axis of the shaft 25, in which position the roll 60 rides-against its inner face, being f W16. the i held there bythe s'pring61. parts are in these relative positions the disk 48 movestwith the trip head 39, as a unit,

- and the release pins 56 and rolls 35'occupy the relative positions substantially as shown in Fig. 3.

To move the rolls so as to prevent them' having a frictional engagement with the r shown by full lines in Fig.1 the feed mechclutch plate 30 and ring 29,the handle 65 is moved upon its' pivot mounting to the position shown by broken lines in'F'igs. 1 and 3, which brings the roll arin64 to the position shown by broken lines in Figs. 1 and 3,

is eccentric to the axis of the shaft 25.

. The spring 61 still maintains the roll 69 in contacttherewith, but while moving to this latter positiqn, the release arm 58 is moved upon its plvot mounting and an independent movement is given to the disk 48 through the pin 59 and the release pins 56 are moved against the rolls 35, which shift.

and break their frictional engagement lee-- wherein the curved position or sweep thereof 65. In other words, locking the lever 65 to tween the clutch face 33 and the rlng 29. So

scribed position, the shafts 25 and 24 remain stat1onary and no feed movement is transmitted to the rolls 26. I

'long as the roll arm 64 occupies the last def When the handle 65 is in. the positionanism is operating, and the'tri latch 17 is in the position "shown by bro en lines in Flgs. 2 and 7, at which time the tail piece 67 is in front of the trip arm 18. as shown by full lines insaid Fig. 1, and by broken lines in Fig. 7 and the screw 20 .in the end of said latch is out of'the path of movement of the head bracket=12, and the trip arm 18 v in this position is held against the tail piece 67 by the spring pressed pin 22. It is there fore impossible to discontinue/the feed operation when the'parts are in the position just described, because the tail piece67 in its then position. prevents movement of the trip arm 18 and stop screw 20.. Y A When the handle 65 is moved to the posilines in Figs. 2 and 7, wherein the tail piece 67 is engaged in the notch 70 and remains 20, whereby the latch is erated again if desired, 'as above described,

so as to permit restablishment 0f the feeding operation by shifting the handle to theoperative position if said handle had been shifted to the ihoperative position in the interval.

In of the drawing thedies are shown in position for feeding the wire, and

the head bracket 12 initsinward position with the trip arm 18 in a positionto prevent the operator from throwing in the feed lever prevent theoperator from throwing in the one that does-not advance-' the--wire to the predetermined length. When the dies 'move and shear'ofi the wire and are overr tdthe heading line 9, the head bracket 12 1s in 1ts outward position and the trip arm 18 would then bein a position shown by'dotted lines in said-figure, at which time the feed lever 65 would be free to be'moved to the full'line position in Fig. 1, as the trip .arm 18 would be swung out of the path of movement of the tail piece 67 on the feed lever 65. In

other words, the .correct. time for throwing in the feed iswhen the dies are in the head ing position. At this time the feed arm 40 1s returning, and at any interval o f/time while 7 the feed arm 49 is 'r'eturnmg ,1s the proper time for the feed lever 65 to be thrown 1nto feeding position. Before the feed arm 40 receives its forward motion for feedingt'he? wire, the dies are pushed over the line ing the trip arm 18 to lock the feed lever 65 so that'the operator cannot throw in the feed to get a partial, or short, feed.

It will be observed, that w1th' this dein'ce, instead of the operator'attempting tocatch a 8 to receive the wire and at the same time allow-- engaged until the head 12 strikes. the screw thrown to thegbroken, .line position shown in Fig. 7. Durlng the 1 fast moving handle to throw the feed in or is not at liberty to'reverse these operations out, as is the case with the ratchet and pawl mechanism in common use, it is only necessary for him to grasp a conveniently located stationary handle that is always in the same relative position. The handle 65 can be .moved from its full line (feed) position to its dotted line -.(non-feed) position .in Fig. 1, at any time, irrespective and regardless of any ,other part.- The operator, however,

by throwing the handle 65 into a position that will allow a feed of the wire 'until the correct time, this being determined by the position of the trip latch 17, whichin turn is controlled by. the position of the dies.

loc ing the same and preventing'the premature accidental movement thereof; means ,controlled by the actioii of the heading dies to prevent movement of said handle except at predetermined periods, said means com-v pr sing a pivotally mounted trip member; an ad ustable member therein in a path of movement of a die controlled element and another arin in the .path of said handle; and means for holding said rock arm against said curved face when the same is in its concentric position whereby the said independentmember will move as a unit with When the handle 65 is in the 'feed positiom i notched e t (full lines, Fig. 1), it cannot be moved farther to the right, as the square end 71 of'the link 66 abuts against the end face of the slot inthesaid handle, (see F igl 3) and the center-.ofthe pin 72 is slightly beyond the only actuatedwhen it is desired to discon herein shown and described, but

dead center sufficiently, to hold it in position and resist any strain upon the roll arni. 64 by the contact of the roll thereon. {No-r.- mally thehandle is in such position as to permit successive feeding movements and is tinue thefeed for any purpose. There are minor changes and alterations thatcan be made within my invention, and I would therefore have it understood, "that I.

donot limit myself tdthe exact construction claim all i and scope that falls fairly within the spirit of the appended claims.

Having described "my inwention, what I claim as new, and desire to secure by Letters Patent, is:

1. In a feed mechanism, the combination tive connection therebetween; means for in termitt'ently rotating said shafts, comprising a notched element; a member covering the 'notch in said notched element; an independent member within said notch mounted ,so that in one position it contacts with one face of' the notch and one face of the said member. covering the notch; means for imparting an intermittentrotary movement to said notched element; a trip member in the path 'ofsaid independent member; means for.- mounting said trip member so that it may move with or independently of said notched element, saidmeans comprisinga rock arm; a roll arm having acnrved face thereon;

' 1 means for moving said roll arm so that said cur'vedface maybe either concentric or eccentric with the axis of said notched element, said means comprising a handle pivotally mounted upon a fixed, part, a connection between said handle and. said .roll arm, said connection being such that when said "roll arm is moved into a position wherein thepcurved face thereon is su bstantially 2. In a feed mechanism, the combination with companion rotary shafts; of an opera-- tive connection ther between; means for intermittently. rotating said shafts, comprising a notched element; a member covering the notch in said notched element; an independent member within said notch mounted so that in one position it contacts with one face of the notch and the member covering the notch means for imparting an inter mittent rotary movement to said notched material to said mittently; feed controlling means; and means comprising a trip latch released by a trip head receiving motion direct from the I dies, whereby said feed controlling means is locked inrpredetermined positions of said dies. r

4. In a device of the character described,

- the combination with movable dies; of a mechanism for feeding material to said dies;

. means comprising a clutch device for operat- L ing the same intermittently; controlling device; and means for locking said control ling means against movement until the dies are in apredet'ermined positionf (i -In a device of the character described;

means for opening and closing said clutch 5. In a device of the character described,

the combination with movable dies; of a V mechanism for feeding material to said dies comprising a clutch operative inone direc- 7 In a device of the character described,

the combinationwith movable dies, of a a mechanism for feeding material to said dies,

said mechanism comprising --a rock shaft, means for rocking the same, and a feed roll and clutch mounted on said shaft; a member' mounted upon. a fixed part; an operative freeing the clutch in one-direction of travel, wherebyintermittent rotation of said feed roll is efiected in one direction only; controlling F means for said clutclf freeing means; and locking means for rendering said controlling means inoperatable at predetermined times. v

12. In a feed mechanism of the class described, the combination of power trans.

mission mechanism; a connecting.\member therefor; a feed roll; a shaft therefor; a clutch mounted on said shaft; means for freeing the clutch in one direction of travel, whereby intermittent rotation of said feed roll iseflected in one direction only; adjust-;

. ing means to vary the position of said conconnection between said member and feeding necting member; mechanism whereby regumechanism whereby the same may be. caused lation of the feed is obtained a feed checkto operate intermittently; and ,mechanism. ing means and locking means for preventbetween said dies and saidmember to preing operation of the feed ,checking means vent the movement of the latter except when at predetermined times. I

- they are in the proper relative positions, 13. In a feed mechanism of the class desaid mechanismbeing subject to the action. scribed, the combination with a.power transof said dies. 1 mitting member; of a shaft; a feed roll and 8. In a device of the character described, a clutch mounted; on said shaft; means for the combination with movable dies; of afreeing the clutch in one direction of rota,

. mechanism for feeding material to said dies, tion, whereby said feed roll is rotated in operating through a clutch engaged in one one direction only; controlling means for direction of travel only; a member mountsaid clutch freelng means-z locking means ed upon a fixed part; an operative connec-"f'or rendering said controlling means inoption comprising allllk, an arm, and a clutch eratable at predetermined times; and adjust-.

. tripping device, between said member and ing means applied to a-connecting member the feeding mechanism, whereby the same for saidypower transmitting member, wheremay be caused to operate intermittently; tby regulation of the feed is obtained. and mechanism between said dies and said 14. In a feed mechanism of theclass demember, comprising a latchkand' releasing scribed, the combination with movable dies;

device, to prevent movement of said mem'-' her-except when thelatch and releasing de-. 1 a rocking member mounted on one of said vice are in the'proper relativepositions, the shafts; power transmission means connected 40 termined' by the position of said dies. operating sai feed roll; a clutch device then position 'of the mechanism beingdeto said rockin member, for intermittently.

9. In combination with movable headin dies, a mechanism for feeding materia thereto; feed controlling means and a lockmounted onthe same shaft as said rocking member; automatic means for engaging said clutch in one direction of" rotation only;

ing device therefor; and means, the action manually operatable controlling means for of which is determined by the movement of said 4 engaging means; and locking means said dies, whereby said locking device. is for preventingoperation of said controllin maintained in an engaged position to 'pren means when said movable dies are n pr .vent the feeding of material to said dies determined positions; except when said dies are in a position to 15. In a feed mechanism of the classde- J receive said material, scribed, the combination with movable dies;

offeed rol-ls mounted on separate shafts;'

10. A feed mechanism of the class de-l of feed rolls mountedon separate shatts-; a scribed, comprising a power transmltting' rocking, member mounted: on one of said' member; a' feed roll; a shaft therefor; a shafts; power transmission means connected 55 clutch mounted on said shaft; means for tosaid rocking member for intermittently freeing the clutch in one direction of travel, operating said ,feed roll; a clutch device whereby intermittent rotation of said feed mounted on the same shaft as sald rocking roll is effected in one direction only; a feed member; automatic means for engaging said checking means; and locking means for preclutch in one direction of rotation only y means at redetermined times. J 11. A eed mechanlsm of the; class deventing opera'tion of-sald controlllng means venting operations ..of the feed checking manually ,operatable controlling means for. I said engaging means; lock ng means for pre-v scribed, comprising a power transmitting when said movable dies are in predetermined member; a feedroll; a shaft thcrefor' a ositions' and a lock actuating device opera P a clutch mounted on said shaft; means for ated directly-by said movable dies,

rocking member mounted on one of said" shafts; power transmission means connected to said rocking member for intermittently operating said feed roll; a clutch device mounted on the same shaft as said rocking member; automatic means for engaging said clutch in one directionlof rotation, only; manually operatable controlling means for said engaging means; locking means for pre-- venting operation of said controlling means when saidmova-bl-e dies are in predetermined positions; a lock actuating device operated directly by saidmovable dies; and means for timing the action of said lockaictuating devlce. 4 v

a 17. In a-feed' mechanism of the class described, thecombinationwith movable dies;

. of feed rolls mounted on separate shafts; a rocking I shafts; power transmission means connected member mounted on one of said to said rocking member for intermittently operating said feed roll; .a' clutch device mounted on the same, shaft as said rocking member; automatic means for engaging said clutch in one direction of rotation only; manually operatable controlling'meahs for said engaging means locking means for preventing operation-of said controlling means when said movable dies are in predetermined positions a lock actuating device operated directly by said movable dies; means for timing the actionof said lock actuating device; and feed regulating means carried by said rocking member;

18. In a feeding mechanism of the class described, the combination with a feed roll driven through a clutch operative in'one direction only; a tripping device operated 'by a tensiomdevice for freeing said clutch;

and controllingmeans for' said tension device, comprising an operating lever; and a movable member link connected thereto,

said movable member bearing on a free end of said tension device'andmaintaining said trip device in an engaged position against the tension device which releases said trips ping device. r v 19. In a feeding mechanism of'the class described, the combination with a feed roll driven through a clutch operative in onedirection of rotation only; of a clutch trip ping device rotative co-axially. with. saidclutch; a tension releasing device"forsaid tripping deviceya member overcoming said releasing device and preventing its action; and operating controlling means for said member. 1. g'

20. Ina machine having a feed mechanism, the combination of a feed roll, intermittentlydriven through a-clutch operative in one direction of rotation only; a clutch tripping device rota-ting with said clutch: a

a J r tension releasing device for" said tripping device; a movable member overcoming saidreleasing device and preventing its action; operating and controlling means for said movable member; and means for. locking said operating and controllingmeans at predetermined times of which themelative position of the working elements of the machine is the determining factor,

21. In a feed mechanism of the class described; an oscillating power,member; ani arm to which motion is imparted by said 7 power member; a rock shaft forIsaid arm; I a fixed clutch element on said shaft; another clutch element and a feed roller connectible go With said fixed. clutch element rotating on v said shaft; and a device interposed between c said clutch elementsfior engaging the same in one direction of rotation only.

22. Ina feed mechanism of the class die-L scribed; power transmission means having anarmt0 which oscillating motion is imparted; a rockshaft for said arm; fixed and loose clutch elements mounted on said shaft;

' means for uniting said clutch elements in one direction of rotation only; and regulating means for said power transmission means, said regulating means comprising an adjusting device wherebythe radial position of said arm is varied on said shaft.

23. Ina machine having working elements operating continuously; afeeding mechanism operating intermittently at regular in I tervals, said mechanism comprising power transmission means ,driving a feed roll 10( through a clutch mounted on the same shaft as the feed roll; an independentlyactuatable clutch tripping device rotatably mounted" with relation, to said clutch; and means operatable only at predetermined times of '105 "which the relative position of said working elements the determining factor, foroperating said clutch tripping device. p i

24. In a machine having working ele- 'ments, to which: blanks are, fed at regular 11 intervals; an intermittently operating feed mechanism comprising power transmission"- means rotating a feed roll through a clutch; an independently actuatable clutch tripping device; manually, operatable means for op- 11 crating said clutc tripping device; and locking means for preventing. operation ofv said manually operated means when saidworking elements are predetermined positions. I

25; In an intermittent feeding mechanism; power transmission means of which a clutch acting'in one direction of rotation only con stitutes a part; means operated manually for controlling said clutch; and means com- 12 prisinga tripping device or disk rotatable by a tension member in a reverse direction to release the clutch; 'a member constantly bearing on said' tension member to maintain said tripping device in an engaged position; 13}

and a handle link connected to said member for lifting the same in order to effect releasing of said tension device.

26. In a machine having movable dies; an intermittent feeding mechanism; power transmission means of which a clutch acting in one direction only constitutes a part; manually operatable means for controlling said clutch, which means comprises a trip ping device; a self-acting tension member for releasing said tripping device; amember bearing on and con-trollingsaid tension device; a handle or operating lever and connecting means for operating said mem her; and a latch for locking said handle or operating lever in predetermined positions of said movable dies.

27. In a machine having movable dies; an intermittent feeding mechanism; power transmission means of which a clutch acting in one direction only constitutes a part; manually operatable means for controlling said clutch, which means comprises a tripping device, a self-acting tension member releasing said tripping device, a movable member bearing on and controlling said tension member, a handle and connecting means for operating said movable member; and a latch held against operation by a trip head or device actuated by said movable dies for locking said handle in predetermined positions of said movable dies.

28. In a machine having movable dies and a feeding mechanism: feed checking means; an operating levertherefor; a self-acting latch locking said lever at predetermined times; and a movable trip head capable of adjustment relatively to said dies and operated directly thereby to disengage said latch.

29. In a machine having movable dies and a feeding mechanism; feed checking means; an operating lever therefor; a pivoted latch, acting under tension, engaging and locking said lever; and a trip head movable independently of said dies but operated directly thereby at a predetermined time to disengage said latch.

In testimony whereof I have hereunto affixed my signature.

RICHARD LESTER WILCOX. 

